How do i deal with being put in a foster home...?

If you know me from yahoo!answers, you would know i have an alcoholic (abusive) dad, and druggie mom. Well, a week ago, my dad slapped me, and i hit my head of the dresser next to me, and it busted my lip. Well my older brother, (he is 15) Got sick of it, and told the school consular. They contacted children in youth, and... well. now they sent me to a foster home BUT.... they let me chose were i wanted to go, and since i don't have any STABLE family members, i went with my best friend kara (: My brother went with his best friend Christan. Anyway, how do i deal with this B'*llSh*t?